Effects of amino acids on the multiscale properties of carbonated wollastonite composites

被引：0

作者：

Khan, Rakibul I. ^{[1
,2
]}

Haque, Muhammad Intesarul ^{[1
]}

Siddique, Salman ^{[1
]}

Landis, Eric N. ^{[3
]}

Ashraf, Warda ^{[1
]}

机构：

[1] Univ Texas Arlington, Dept Civil Engn, Nedderman Hall, Arlington, TX 76010 USA

[2] Laticrete Int Inc, Bethany, CT 06524 USA

[3] Univ Maine, Dept Civil & Environm Engn, Orono, ME 04473 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 374卷

基金：

美国国家科学基金会;

关键词：

Calcium Silicate; Carbonation; CaCO3; Biomineralization; Amino Acids; Wollastonite; Leaching; CO2; footprint; Fracture toughness; Polymorphs;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This article presents an insight into the effects of amino acids on the moisture susceptibility, nanomechanical properties, and fracture properties of carbonated wollastonite composites. Paste samples containing various concentrations of amino acids were subjected to a CO2-rich environment. The addition of amino acids resulted in the formation of amorphous calcium carbonate (ACC), vaterite, and aragonite, instead of calcite, in the carbonated composites. Thermogravimetric analysis (TGA), Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and nanoindentation were performed for microstructural analysis. Inductively coupled plasma-optical emission spectrometry (ICP-OES) was performed to determine the leaching of Ca2+ and Si2+ ions from carbonated wollastonite composites. It was observed that the chain lengths of the amino acids have an influence on the formation of crystal phases. For determining fracture properties, the Jenq-Shah model was performed using a notched beam. It was observed that amino acids reduced carbonation reaction and improved fracture properties by 156 %. The formation of metastable CaCO3 enhanced the nanomechanical properties of this carbonated system.

引用

页数：12